Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc264e9863d5e08…

MALICIOUS

PDF

78.4 KB Created: 2021-03-24 17:48:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 364f5a2257ed5d2a37e3992b1814bfb5 SHA-1: 900d74a5bc6f07e15999a360d523b5178cdc23bb SHA-256: 6bc264e9863d5e08ce1c56dd40b33ac5ff8c145fb9b636f6189b502355ed0ac8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable domains, many of which are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/wix?keyword=oster+toaster+oven+model+tssttvvg01
    • http://fuxutigox.mypressonline.com/reglas_de_acentuacion_de_las_palabras_esdrujulas_ejemplos.pdf
    • http://tetoxukipim.getenjoyment.net/bunodomijatobutalakix.pdf
    • http://choosenews.space/e-com_awb_number_trackingk6s63.pdf
    • http://faponabon.mygamesonline.org/nopokulexavi.pdf
    • http://erogan-encolumbia.site/48283497513ngfiw.pdf
    • http://fuxisileza.mywebcommunity.org/pampered_chef_apple_salsa_recipe.pdf
    • http://paxezot.getenjoyment.net/runabopegep.pdf
    • http://fredo.bike/biginarujofefolonz69e.pdf
    • https://cdn.sqhk.co/nugopanage/eihYiey/lijuboziribimuvef.pdf
    • http://idealicacolumbia.site/hillsong_songs_lyrics_and_chordsj2b5l.pdf
    • https://cdn.sqhk.co/mipijotom/ijOFQjf/wba_stock_price.pdf
    • http://ergors.space/217601962562fyjt.pdf
    • https://cdn.sqhk.co/bodosuruwalu/Rif2Rhj/lumabatemasid.pdf
    • http://wativeb.mypressonline.com/jipavopukojupupifipeka.pdf
    • http://plafond.xyz/dosage_calculation_practice_worksheet_with_answersb8ph1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/c7da5214-f607-4771-997c-dd2ecc5e62d8/foxatasurisafinuza.pdf
    • https://uploads.strikinglycdn.com/files/a71eca0f-30ce-4507-a23b-4ab86833fb80/gogowipikoxu.pdf
    • http://geforagegi.atwebpages.com/zosyn_davis.pdf
    • http://zitulogakapede.myartsonline.com/byomkesh_bakshi_stories_bengali.pdf
    • https://uploads.strikinglycdn.com/files/a5f273e0-1f65-467a-8fa2-d8cf86ba642f/zurufamudanidakugiw.pdf
    • https://uploads.strikinglycdn.com/files/63d9df8f-aff8-4bdd-bc47-38b2e6e3e1da/fukugenijake.pdf
    • https://uploads.strikinglycdn.com/files/e95cfecc-71da-4d2b-a4bc-363cd4694f8c/life_fitness_95te_diagnostic_mode.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e825.bin
bb97d42c67ebde454fd11f903249974987d824b0ca0d98d5231ff1d5d4a53260		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE825 5164 bytes
font_01_sfnt_off0000f9a3.bin
496c9e71d780e9d5e2873dafe1d363dec1b197fef15ab059c74b4f3ec435dd87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A3 10792 bytes
font_02_sfnt_off00011e56.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E56 4324 bytes

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